Warp stop-motion for looms.



No. 863,130. PATENTED AUG. 13} 1-9075 Q. B. AMBLER.

'1 WARP STGP MOTION FOR LODMS.

APPLIOATIGH 1 12.31) AUG. 8, mos.

8 SHEETSSHEET 2.

PATENTED AUG. T 3, 1907. G. B, AMBLHR. WARE STOP MQTI FOB. Locm's.

.- APPLIGATIOH FILED AUG. 8, 1906.

' s SHBBT8.SHEET 3.,

(*1 rg'i A rings f shrines QAMBLER, 0F nonsmrn, lviiiSgiiGHb ElTS, ASSIGNGR no DRAPER COMPANY, or

- HOPEDALE, lviASSACHUSETTS, A CORPORATION MAINE.

" its. scares.

Specification of Letters rat-ens.

Application filed August 8, 06. Serial Fe. 329,656.

ticularly'to detect failure of a warp-thread, (either its "breakage or rimning out,) and thereupon effect the "actuatioififif-a loom-stopping instrumentality so that the weaver can remedy the iaul. In such a case the faulty thread is usually found without much trouble hankalas for instance in United States Patent No.

794922, granted to Boivert .luly 18,1905.

'When a warp-thread becbmes unduly slack the stopro'otion oit'en operates just as if the'thread had failed, a

" great deal of trouble and delay being occasioned by snch stoppages'because a slack thread is often very 'tiorr on the loom. 1*

diificult to locate, resulting in material loss of producstop the loom for slack threads for often if the loom could run on the slacklress. would be gradually-taken up, or during such continued operation the weaver would have ample time to find the slack thread and correct it it necessary. Ordinarily the loom cannot he started up after it has been stopped by operation of the warp-stoprnotion until the cause of such operation has been discovered and removed, whether it he iailureflor undue slacknessoi a warp-thread, for if the loom is started the samecause will efiect'its immediate stoppage. 'lhusthe time wasted on account of slack 1 thread stoppages cannot be prevented.

My present invention for its object the production oi mean s whereby, 'by a; r1d at the will of the attenclant or waventhe loom can be started up and run,

ar'ter s toppage by the v arp-stop-motion, without first removing the canse of operation of the latter. Thereby, if the stoppage is due to a slack thread, the loom 1" can be started up immediately and the slack thread WbVD llp, 0r discovered at leisure, without decreasing the production of'the loom.-

In the present embodiment of my invention I'ren- I novel 1"eatures of my invention will be i the subjoinedspeciiication and out in the inflow requently it is unnecessary to operate with and arrest a normally vibrated feeler f.

Figure 1 partial transverse sectional view of portion of a loom provided with a warp-stop-motion oi the so-called fcoti. n-harness type, with. one practical embodiment of my invention applied thereto, the

parts being shown normal condition and. the loom inv 5i) operation; 1,. 2 is similar view, but flowing in in vention an; (i to a loom provided with a wage-stop mot-ion oil. steel-harness type, the controlling detectorsfor the stop-notion serving also as hedd'ies; Fig. 3 is an enlarged top plan view of the means for rendering the operation of the warp-stop-motion ineffestive to cause loom stoppage, in accordancewith my invention; Fig. i is a cross-sectional detail on the line 4, Fig. 3, to be referred to; 5 is a detail inside elevation of one of the rocker-arms shown in Figs. 3 and 4; Fig. 5 is a side elevation of the controlling means 'shown'at the lower ri ht hand ort-ion of F1 s.

l and 2 but in abnormal position, to prevent lo'om stoppage by operation of the' warp-stop-motion; Fig. 7 is a crosssectional detail of a modified form of cotton harness warp-stop-notion in normal running condition; Fig. 8 is view thereof showing the manner of centralizing the feeler after its arrest by a released detector, to relieve the latter from strain due to pressure of the ieeler, as will be explained hereinafter. 8

Referring to Figs. 1 and 2, the lay l, cam-shaft 2, shipper 3, and its notched holding plate 4, may be and are all of usual construction, the shipper when released acting to throw oil the power from the loom and effect stoppage thereof.

In Fig. l the sheds are formed by harnesses 5 recipv rocated in any suitable manner forming no part of my invention, and the warp-stop-motion shown therein is of the so-called cotton-harness type, suhstantially as in patent to Stimpson No. 673824, granted May 7,1991, slotted detectors 03 being hung on the warp-threads be tween the lease rods L, one detector for each thread, the detectors being arranged as shown .in two banks, a released detector in either bank being adapted to co-' 95 The feeler rock-shaft F is connected by links 72?, k with arms h, b respectively, in the Stinipson patent referred to, a ioliower b cooperating with the cam O on the shaft 2, the latter also being provided with tappets t, t", as in the patent just referred to. The arms h and h are mounted on a hooked link Ed, movable longitudinally in the direction of the arrow 100, when the feeler is arrested, all as described in the Stimpson pat out. In the latter, such movement of the link always operates a knock-oil member or arm to release the shipper from its holding notch, and thereby effect loom stoppage, the release of a detector a being due either to failure or undue slackness of its warpthread. Herein I have connected the a J-niotion with the knock-oil sir. t weaver can at will render thebtop-motion ineffective to cause release of the shipper.

Referring to Figs. 1, 3-, 4 and 5, a knock-off member 6 shown as having a cam-slot 7 at its upper end to receive the lower end of the shipper 3, is fixedly secured to'the end of a rock-shaft 8 which is projected beyond the loom-side as shown inFig. 1, the rock-shaft being suit ably supported in hearings on the cross-girt 9 of the loom. An arm 10 has itshub 11 fixedly secured to the rock-shaft 8, the arm projecting rearwardly and down Wardly and having an enlarged lower end provided with a notched coupling slot 12, 13, thenotch being indicated at 13. Adjacent the end of the hub 11 I have inourited loosely upon the rock-shaft 8 the hub 14 of an arm 15 enlarged at its lower end to present an elongated .camslot 16, clearly shown in Figs. 1, 2, 4 aridbf, the hubj14 having an opposite upward extension 17 to which is securedv a foot treadle 18 projecting above the cross-girt 9. A spring 20, Fig. 3, is coiled around the rock-shaft and connected at one end with the hub 14, the other end of the spring being held by a collar 21, fixed on the rockshatt, the spring tending to maintain the treadle in the position shown in Fig. 1. The lower end of the link M is extended between the two rocker arms 10 and 15,.and

is provided withopposite lateral projections, one, of

which as 22 is squared and extends into the coupling slot 12, 13, while the opposite projection 23 is made cylindrical to freely enter the, cam-slot 16. In Fig. 4, the lower end of the link and the projections or lugs are shown in dotted lines, withthe parts in normal position, the lug 22 serving as a species of follower in the notched coupling slot. l

When the parts are in the position. shown in Figs. 1 and 4, the arm 15 acts through its cam-slot 16 to maintain the follower 22 seated in the notch 13, and when the link M is moved in the direction of the arrow 100 by the operation of the warp-stop-motion, both arms 10 and 15 and the rock-shaft 8 will be turned in the direction of the arrow 24, Fig. 4, such turning of the rockshaft causing the knock'off member 6 to effect shipper release. If, however, the stoppage of the loom has been caused by a slack warp-thread, it is often unnecesmry forthe weaver to locate it, for by starting up the loom such thread can usually be woven up. Accordingly the weaver places his foot upon and depresses the treadle 15, to the position shown in Fig. 6, thereby swinging the'arm 15 rela-- tively to the arm 10, and in the first'part of such movement, the cam-slot 16 acts to lift the projections 23 and 22, removing the latter from the'notch 13, thereby uncoupling. or releasing the operating connection between the warp-stop-motion and the rockshaft 8, so that the shipper can be thrown on and the loom started. The latter part of the movement of the cam-slot 16 acts to move the link M in the direction of the arrow 100, Fig. 1, until the follower h? is out of scend intermittingly, there will be nothing to cause operation of the shipper-releasing means. As soon as the slack thread has been woveh up, the treadle lis released, the spring 20 returning the arm 15 to its norcontact With 1311603131 C, thereby stopping the vibrations of the feeler f. The loom will'continue to run mal' position with relation to the arm 10, and the follower or projection 22 is thereby restored to operative position in the notch 13 of the coupling slot. If the thread which causes the initial stoppage of the loom is so slack that it cannot be woven up within a short time, the continued operation otthe loom, rendered possible by uncoupling the stop-motion from the shipperreleasing means, will enable the weaver to locate the slack thread and correct the fault.

In Fig. 1, the stop-motion is shown as provided with a visual signal 5 having afinger-piece 7 the said signalflbeing connected -at itslower end to an arm 6 fast on the feeler rock-shaft F, all substantially as in the Boivert patent'No 724922 hereinbefore referred to: When the loom is stopped by operation of the warpstop-motion, the signal shows the weaver in which bank the released detector is located, and if it is in the rear bank, he presses down the signal by means of the finger-piece 7 releasing such detector from any pressure due to the feeler and holds it down 85 while the loom is weaving up the slack-thread, after it has been started again. If the released detector is .in the front bank, the feeler is rocked to the rear when the link M is moved as described, thereby moving away'from the abnormally-positioned detector, the slack thread being free-to be woven up without any attention from the weaver, so long as the treadle is depressed. This will be clear from an inspection of Fig. 6, for it will be seen that such depression of the treadle causes the lower front end of the cam-slot 16 to act upon the. projection 23 and hold the link M in abnormal position, even afterthe shipper has been moved to running position, and whenev enthe link is in its upper or abnormal position the feeler will; be held away from a released detector in the front bank. Consequently, with the signal device shown in Fig. 1 the weaver disengages the feeler from a detector in the rear bankby manual movement of the signal, but if the released detector is-in the frontlbank the operation of the coupling device by the treadle insures disen--105 gagement of the feeler and the released detector. It

is advisable to relieve the released detector from strain due to cooperation with the feeler, as otherwise the pull on the warp-thread might be great enough to break the thread on the beat up of the lay, and so, too, -1]0 i the released detector is not constantly hit by the feeler as would be the case were the fe'el'er vibrationsto continue. I p I In Fig. 2, I have shown the loom'as provided with .a I so-called steel-harness type of stop motion,.wherein the controlling detectors serve also as heddles, each of 5 the harness-frames forming part of the shed-forming mechanism including anupper cross-bar a which serves as a support for and from which the detector-heddles d are suspended; Said detector-heddles are provided with warp-eyes d, and are slotted at or near theirupper ends to receive the supports a the slots being. long enough to permit relative longitudinal movement -of a heddle iwhen under certain conditionsreleased by failure or undue slackness of its warp-thread. In this type of stop-motion, two oppositely moving feelers f are carried by rock-shafts f geared together by toothed segments f and drawn toward each other by a spring s whichlatter effects the feeling stroke. The outward .stroke of the feelers is effected positively by mechan- 1 30 ceases tion of the mechanismindicated at N is well known in the art, and needs no further description other than to state that when a detectonheddle is released by failure or undue slaclzness of its warp-threachtl're lower end of such heddle will engage and arrest its feeler, when the corresponding harnessirame is'down. Such arrest of the leeler operates to move the linkM in the direction of the arrow Fig' 2, and if the lower end of the link is operatively coupled to the. shipper-releasing means, the shipper will be released and loom stoppage effected. The link lfv and its longitudinal movementfl.

and the coupling arrangement for operatively connecting it with or disconnecting it from the shipperreleasing means are all substantially as shown in Fig.

l and which have been previously described in detail. The structure illustrated in Fig. 2 is therefore for the purpose of showing my invention in connection with a steel harness type-of stop-motion, as well as with the cotton-harness type illustrated in Fig. l. I

It is unnecessary to provide any means to relieve a released detector-heddle from strain due to the feeler, so far as my present invention is concerned, because when the harness-frame in which the released detectorheddle is located rises, it will lift up such heddle with it, and out oi range of the ieeler, so that the lay can beat up without unduly straining the slack thread which has caused the operation of the stop-motion.

The specific details of construction and arrangemen of the coupling device are not'restricted to the single practical embodiment thereof herein shown, for various changes or rearrangements of details may be made therein by those skilled in the art without departing from the spirit and scope of my invention.

So far as I am aware it is new to provide means to hold quiescent the ieeler in a warp-stop-motion while the loom continues to run, thereby preventing it from causing the stoppage of the loom; and also, so far as'I am aware, it is new to provide means operated by the foot of the weaver to render the operation of a warprocker arm Ir? conn'ecte d by the link k rock-shalt is provided with a lateral lug or-projection 75. which projeg'ztsfa'- enough teat times engage the stop-motion ineffective to cause loom stoppage, and accordingly, I do not restrict my invention merely to the practical embodiment herein illustrated.

In Figs. 7 and 8, a warp-stop-motion for cottonharnesses shown, wherein the detectors (1 arranged in two banks as shown in Fig. l, are provided with warpeyes d and are longitudinally slotted above such warp eyes at d to receive supporting cross-bars a The single ieeler f mounted on the rock-shaft F is arranged to cooperate with a released detector in either bank, but in this arrangement no means is shown for signaling visually in which bank a released detector is located, as explained with respect to the mechanism shown in Fig. 1. In order therefore to centralize the feeler after its ieeler movement has been arrested by a released detector, to relieve the latter from strain. some other means must he provided. in United States patent to Draper, No. 671666, dated April 9, 1901, mechanism is shown for effecting such detector release auton'iatically.

In the arrangement shown in Figs. 7 and 8, the with the ieeler yoke'm, the latter being substantially as in the Stimpson patent No. 673824,'and carried by the hooked link ill.- The'spring which tends to swing the follower it toward the cam O, as in the Stimpson patent, also tends toliit the link h? and thereby swing the ieeler f to the position shown in Fig. .7, and such swing is limited by engagement of the lug with the yoke m.

. 75 In Fig. 8 the link is shown in such abnormal position, the yoke m then being at a higher point than it occupied when the link was in normal position, and the tendency of the follower spring to depress the arm it brings the lug 7 5 against the yoke, stopping the ieeler. in mid-position, as shown. Hence the released detector will be freed from feeler strain Whether in the front or rear bank, the dotted lines in Fig. 8 showing the clearance between the released detector and the feeler. The weaver then having found that stoppage is due to a slack thread, puts his foot upon the treadle l8 and depresses it to the position shown in Fig. 6 and throws the shipper into running position, starting the loom. The depression of the'treadle acts to maintain the link M in its abnormal position, Fig. 8, with the 96, feeler centralized, and as the released detector is free from ieeler strain the slack thread is woven up, or the weaver is given ample time to locate it and correct the slackness if necessary. 4

Having fully described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a loom, mechanism to detect failure or undue slackness of a warp-thread, .a shipper, a. connection between it and the said mechanism to effect shipper release by the operation of said mechanism, and a treadle-actuated shipper while permittingsaid mechanism to continue in operation due to a slack thread.

3. In a loom, a shipper, releasing means therefor including' a knockoff member and a rock-shaft on which it is rigidly mounted, mechanism rendered operative by failure or undue slackness of a warp-thread, a transmitter between said mechanism and the rock-shatt, to turn the latter and actuate. the knock-oft member,' and a footoperated controlling device to positively connect or disconnect the transmitter and rock-shaft.

4. In a loom, a shipper, an angularly movable knock-off 11 member thierefor, a rigidly connected arm having a notched slot, warp-stop-motion mechanism, a transmitting link operated thereby and having a follower to enter the slot and normally operate the knock-0E member to release the shipper, and a controller actuated at the will of the operator to remove the follower from the notch and thereby disconnectthe link and slotted arm, preventing operation of the knock-off member by the said stop motion n1ech-- I anism.

In a loom, a shipper, releasing means therefor, in

eluding a i'ocker-arm' having a notched slot, warp-stopnrotion mechanism, a transmitting member having a follower to'enter the slot and when n the notch thereof tothread, and a transmitting member actuated by said mechanism and havingflateral projections cooperating respectively with the said notched slot and the camsiot, the iontrollingrarmmy its position acting to maintain one of the projections in or out of the notch of the rocker-arm slot, to operatively connect or disconnect, respectively, the shipperreleasing means and the mechanism operated by the occurrence of a warp fault. g

7-; Iir a loom, ashipper, releasing means including a rocker-arm, mechanism operated by failure or undue slackness of a warp-thread, a transmitting member actuated thereby, a coupling between said member and the rockerarm, and a controller governed by the foot of the weaver to open or close the coupling and thereby prevent -or cause the actuation of the shipper releasing means by said warpgoverned mechanism.

8. In a loom, a shipper, releasing means therefor, including a rock-shaft having an arm fast thereon provided with a'coupling slot, an adjacent arm loose on the shaft, having a cam slot and an attached foot'treadle, a link between the arms having a coupling mg to enter the coupling slot and an opposite lug to enter the cam slot,

1 and mechanism operated by failure or undue Blackness of a warp-thread to actuate the link and operate the shipper releasing means when the coupling lug is locked in the coupling slot, r'elative movement of the "slotted arms by the weaver acting through the cam slot and its "coiiperat;

ing lug todisengage the coupling lug and slot and thereby prevent operation of the shipper releasing means.

9. In a loom, a shipper, releasing means therefor, including a rock-shaft, a fast and a loose arm thereon; 'a foot-treadle on the latter, mechanism operated .by failure or undue slackness of a warp-thread, a link actuated by said mechanism, and connections between the link and said arms, to normally rock the shaft and eifect shipper release by operation of said mechanism, relative angular.

movement of the arms by-the weaver, through the treadle, 4 disconnecting the link and fast arm to thereby prevent rocking of the shaft by the link.

10. In a loom, in combination, two banks of. stop-m0- tion-controlling detectors each governed by a single warpthread, a vibrating-jeeler to be arrested by a released detector in either bank, a vertically-movable visual signal connected with the feeler and having a finger-piece, a shipper, releasing means therefor, adapted to be operated by or through arres't-ot'the feeler, a coupling between said thread and arranged in two banks, and a vibrating feeler to be operated by or through arrest of the feeler; an in scan-so strumentality controlled and operated by the weaver to cause or prevent actuation of the shippenreleasing means by the stop-motion, and means to centralize the feeler with respect to the two banks of detectors when said instrumentality is operated. l

12. In a loom, a shipper, releasing means therefor, a warp-stop-moqion operated by failure or undue slacknes's of a Warp-thread, a connection including a coupling, be-

tween the stop-motion and said releasing means, to normally effect; shipper release by the operation of the stopmotion, and means actuated by the foot of the weaver to render the coupling inoperative, whereby upon movement of the shipper to running position after release due to the stop-motion the loom will operate irrespective of continued operation of the warp-stop m'otion.

13. In ;a loom, mechanism, including a normally vibrating feele'r, to'detect failure or undue slackness of a warpthread, a shipper, an instrumentality to effect shipper re: lease by the operation of said mechanism, and means to render said instrumentslity inoperative at will and stop the vibrations of the feeler.

14. in a loom, in combination, a warp-stop-motion, in- V eluding controlling-detectors each governed by a warpthrend and arranged in two banks, a normallyvibrating feeler to, be arrested, by engagement with a released detector, a shipper, releasing means therefor normally operated by or through feeler arrest, and means operatedby the weaver to render the shipper-releasing means irrespon sive to'feeler arrest and to stop feeler vibrations with the feelercentralized with respect to the two banks of detectors.

'15. "In a'loomfin combination, a warp-stop-motion, including detectors controlled by the warp-threads and a vibrating feeler to engage a detector released by failure or undue slackness of its warp-thread, shipper-releasing means adapted to be operated 'by or through such engage ment, and means actuated by and at the will of the weaver to prevent such operation of the shipper-releasingumeans and stop movement of the feeler during the time the said releasing means is held from operation.

taneously stop vibration of the feeler, whereby, upon loom.

stoppage 'by or through a slack thread the weaver can start up the loom to weave up the slack, the stop-motion remaining quiescent and the shipper-releasing means in- -operative during such weaving.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

GEORGE B. AMBLER.

Witnesses:

CLARE H. DRAPER, FRANK J. BUTCHER. 

